dadfdbe5-f658-4bf0-915d-6cd6382241d7 https://ipt.inbo.be/resource?r=luronium-natans-part2-occurrences An Leyssen Research Institute for Nature and Forest (INBO)

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an.leyssen@inbo.be 0000-0003-3537-286X Dimitri Brosens Research Institute for Nature and Forest (INBO) / Belgian Biodiversity Platform

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dimitri.brosens@inbo.be 0000-0002-0846-9116 Dimitri Brosens Research Institute for Nature and Forest (INBO) / Belgian Biodiversity Platform

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dimitri.brosens@inbo.be 0000-0002-0846-9116 An Leyssen Research Institute for Nature and Forest (INBO)

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an.leyssen@inbo.be 0000-0003-3537-286X 2025-10-27 eng Luronium natans habitats in Flanders, Belgium is a sampling event dataset published by the Research Institute for Nature and Forest (INBO). This dataset contains all non-invasive aquatic plants collected during a Luronium natans survey. Here it is published as a standardized Darwin Core Archive and includes for each sampling event an eventID, date, location and sampling protocol (in the event core) and for each occurrence an occurrenceID, the abundance of recorded individuals, status (present/absent) and scientific name (in the occurrence extension). Issues with the dataset can be reported at https://github.com/inbo/data-publication/issues. All the recorded invasive plants in these habitats are published in this sister dataset: https://doi.org/10.15468/tar6w7. We have released this dataset under a Creative Commons Attribution data licence. We would appreciate it if you follow the GBIF citation guidelines (https://www.gbif.org/citation-guidelines ) when using the data. If you have any questions regarding this dataset, don't hesitate to contact us via the contact information provided in the metadata. Samplingevent GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xml freshwater survey macrophyte plant n/a Samplingevent GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml Observation GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License. Creative Commons Attribution 4.0 International https://spdx.org/licenses/CC-BY-4.0.html CC-BY-4.0 Flanders, Belgium 2.53 5.94 51.51 50.67 2008-06-25 2024-09-10 only the non invasive species in the Luronium natans survey are published in this dataset. For the invasive species we refer to https://doi.org/10.15468/tar6w7 kingdom Plantae Many thanks to everyone who contributed to the creation of this dataset. In particular, we would like to thank colleagues, former colleagues and students who assisted with the fieldwork: Anne Ronse, Jo Packet, Luc Denys, Kevin Scheers, Vincent Smeekens, Nils Bouillard, Wim Jambon, Fien De Schacht, Bert Berten and Florian Van Hecke. We would also like to thank ANB, Natuurpunt and the military services for granting access to the areas. Also, many thanks to the volunteers from Natuurpunt and Likona, Ankona and Brakona for reporting new sites with floating water-plantain. asNeeded An Leyssen Research Institute for Nature and Forest (INBO)

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an.leyssen@inbo.be 0000-0003-3537-286X Data are collected in the field by specialized personnel. A custom SQL view is created in the NBN database to map the original data to Darwin Core as an event core and occurrence extension. The Darwin Core views are connected to the INBO IPT and documented with metadata. The dataset is published and registered with GBIF. Luronium natans is an amphibic species, present in both lentic and lotic waterbodies. Its actual range is restricted to the north-eastern part of Flanders. Vegetation recording is carried out during june-september for each site on different levels (https://inbo.github.io/protocols/2023.06/index.html): * waterbody level: description of the waterbody, presence of macrophyte taxa in the waterbody (samplingProtocol = tally sheet) * population of Luronium natans: presence or absence of Luronium natans (samplingProtocol = site description) * permanent quadrant of 1 square meter in an abundant patch of Luronium natans. Only recorded in 2008 & 2009; taxon occurrence using Braun Blanquet scale (samplingProtocol = vegetation record) Data are collected by professionals ensuring the quality of the records. An Leyssen 0000-0003-3537-286X pointOfContact A survey of Luronium natans was carried out in Flanders to determine the habitat requirements of this rare species. This species is protected by the Natura 2000 Habitats Directive (Annex 2). This research will continue to monitor the distribution and quality of this species for the purposes of Article 17 reporting of the EU Habitats Directive. Flemish Government Flanders, Belgium As Luronium natans has a restricted distribution, monitoring is carried out on all known populations in Flanders. Also, some recently disappeared sites and some locations with supposed presence of Luronium natans are included. Data collection is based on a field protocol (https://inbo.github.io/protocols/2023.06/index.html) and includes data collection to determine the local conservation status of Luronium natans (Lommaert et al., 2020). 2020-12-01T09:54:32.219+01:00 dataset Leyssen A, Brosens D (2025). Luronium natans habitats in Flanders, Belgium. Version 1.18. Research Institute for Nature and Forest (INBO). Samplingevent dataset. https://ipt.inbo.be/resource?r=luronium-natans-part2-occurrences&v=1.18 Denys L., Packet J., Leyssen A., Adriaens D. (2008). Drijvende waterweegbree (Luronium natans). In: Adriaens D., Adriaens T., Ameeuw G. (editors). Ontwikkeling van criteria voor de beoordeling van de lokale staat van instandhouding van de habitatrichtlijnsoorten. Brussel: Instituut voor Natuur- en Bosonderzoek. p 32-36. Lommaert L., Adriaens D., Pollet M. (2020). Criteria voor de beoordeling van de lokale staat van instandhouding van de Habitatrichtlijnsoorten in Vlaanderen. Versie 2.0. Brussel: Instituut voor Natuur- en Bosonderzoek. Leyssen A, Brosens D, Ronse A, Reyserhove L, Desmet P, De Knijf G, Denys L, Packet J, Scheers K, Smeekens V (2021): Invasive plants in Luronium natans habitats in Flanders, Belgium. v1.11. Research Institute for Nature and Forest (INBO). Dataset/Samplingevent. dadfdbe5-f658-4bf0-915d-6cd6382241d7/v1.18.xml